.Cheader{
    height: 40px;
    line-height: 40px;
    background: #00bcd4;
    text-align: center;
    /* position: fixed; */
    left: 0;
    right: 0;
    z-index: 100;
}
.c_back{
    position: absolute;
    left: 10px;

}
.c_text{
    color: #ffffff;
    font-size: 16px;
}